mount script for chroot on raspi

#!/bin/bash

mnt=mount
root_disk=raspi.img
mnt_devices="proc dev dev/pts sys"

sudo mkdir "$mnt"
sudo mount -o loop,offset=62914560 $root_disk "$mnt"

for i in $mnt_devices ; do
sudo mount -o bind /$i "$mnt"/$i
done

sudo chroot "$mnt" /bin/bash